JPH071067Y2 - Heater mounting device for electric hot water storage container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a heater mounting device for an electric hot water storage container such as an electric pot.

(Prior Art) A type in which a flat heater is applied to a flat surface of a bottom portion of a hot water storage container to hold the hot water storage container is known from Japanese Patent Publication No. 62-5609. In this product, a heater is fitted in a recess formed in the bottom surface of the bottom of the hot water storage container, a metal diffusion plate is fitted from the back of the hot water storage container, and a back plate pressed against the back of the metal diffusion plate is attached to the bottom of the hot water storage container. Is held together with the metal diffusion plate.

(Problems to be solved by the invention) However, in the above-mentioned conventional heater, since the upper surface of the heater is only in contact with the inner surface of the recess and there is a gap between the outer peripheral portion and the recess, the heater is not connected to the hot water storage container. The direct heat conduction surface is small only on the top surface, and the heater is likely to be displaced by the above-mentioned gap only by pressing and holding the heater from the back portion, and the movement of the heater may cause looseness in the contact state with the hot water storage container. Even if a diffusion plate and a back plate are located on the back of the heater to move the heat to the side of the hot water storage container, it is difficult to prevent the heat from escaping to the back side of the heater, so the heating efficiency of the content liquid tends to be low. Is. Further, if the heater is displaced, the position of heat conduction to the hot water storage container is biased, and the heating efficiency of the content liquid is further reduced.

On the other hand, Japanese Utility Model Laid-Open No. 59-181610 discloses a heating container in which a heat insulating material is applied to the back surface of the heater to prevent heat from escaping to the back surface side. However, since the outer peripheral surface of the heater is open, it is not possible to prevent heat from escaping laterally from the thick heater, so that the heating efficiency of the content liquid is still low.

Therefore, an object of the present invention is to provide a heater mounting device for an electric hot water storage container which can solve the above problems by further improving the heater mounting structure.

(Means for Solving Problems) In order to achieve the above-mentioned object, the present invention provides a heater in a recess formed in the bottom of a hot water storage container so that the upper surface and the outer peripheral surface of the heater contact the inner surface of the recess. It is characterized in that the heater is pressed and held by the heater mounting member fitted in the hot water storage container as described above via the spring member and the heat insulating member located in the recess.

(Operation) The heater provided in the hot water storage container is fitted into the recess formed in the bottom portion of the hot water storage container so that the upper surface and the outer peripheral surface contact the inner surface of the recess. The surface also serves as a surface for directly conducting heat to the hot water storage container, and this state is often maintained by pressing from the back surface by the heater mounting member, the heat insulating member, and the spring member.

Further, although the back surface of the heater is the only surface that does not affect the direct heat conduction to the hot water storage container, the heat insulating member located in the recess allows the heater and the spring member to be confined in the recess. The heat that tries to escape to the back side of the is confined in the recess, and does not easily escape to the outside, but most of it is transferred to the hot water storage container side.

Furthermore, since there is no gap between the outer peripheral surface of the heater and the recess, the heater will not be displaced even if it is only held by being pressed from the back side via the spring member. It is possible to avoid that the position of heat conduction to the hot water storage container is deviated and that the contact with the hot water storage container is weakened due to the movement of the heater.

Therefore, the heat from the heater can be sufficiently prevented from escaping to the outside of the hot water storage container, and the heating efficiency of the content liquid can be sufficiently improved.

(Embodiment) A first embodiment of the present invention shown in FIGS. 1 and 2 will be described. In this embodiment, the heater 1 is provided in an outer case (not shown).
It shows a case of a boiling type electric pot in which the inner container 2 having is stored as a hot water storage container.

The inner container 2 is made of aluminum having good thermal conductivity, and is connected to the outer body by a shoulder member 3 made of synthetic resin at the upper end, and by a connecting fitting 4 and a bottom member 5 made of synthetic resin at the lower end. Form body 6.

A discharge port 7 for discharging the content liquid to the outside of the shoulder member 3 is integrally assembled in a structure having a fall stop water valve 8 built-in,
Bearing part 9 for detachably pivoting a body lid (not shown) on the rear part
And a vapor sensor 10 mounted so as to face a part of a vapor discharge path provided in an inner lid (not shown) for closing the inner container 2 or the vessel lid.

A discharge path 11 for discharging the content liquid pressurized by a bellows pump or the like in a container lid (not shown) to one side of the lower portion of the inner container 2.
Is connected, and the content liquid discharged by connecting the tip of the outlet path 11 to the discharge port 7 flows out from the discharge port 7. A liquid amount display portion formed by a transparent tube 12 is provided in the middle of the outlet path 11.

As shown in detail in FIG. 2, the heater 1 includes an insulating heater base 24 in which a mica plate 22, a heat-retaining heater wire 23a and a boiling water heater wire 23b are wound in a shallow pan heater case 21 made of aluminum. Plate 25, plus aluminum lid
26 is sequentially inserted, the container opening 21a of the heater case 21 is folded back to form a crimped heater unit, which is formed into a flat disk shape having a through hole 1a in the center.

The portion of the inner container 2 where the heater 1 is provided is a recess 2b formed in the center of the lower surface of the bottom 2a. The ceiling surface 2c of the recess 2b is formed into a flat surface, and the heater 1 is applied to the ceiling surface 2c at the bottom portion 21a of the heater case 21, which is the flat surface side, and the upper surface and the outer peripheral surface of the heater 1 contact the inner surface of the recess 2b. Thus, the heater 1 is fitted in the recess 2b. A spring member 31 and a heat insulating material 32 made of stainless steel are sequentially applied to the back portion of the heater 1 so that the spring member and the heat insulating member are located in the recess 2b, and the heater mounting plate 33 is pressed from the back portion thereof. The heater 1 is held in a state of being applied to the inner container 2, and for this holding, the heater mounting plate 33 is attached to the inner container 2 at several points on its outer periphery with screws 36. This mounting is performed on a mounting member 37 mounted by spot welding on the bottom of the inner container 2.

As described above, the heater 1 is fitted into the inner container 2 by fitting the heater 1 into the recess 2b formed in the bottom of the inner container 2 as a hot water storage container so that the upper surface and the outer peripheral surface of the heater are in contact with the inner surface of the recess 2b. A spring member 31 for positioning the heater 1 in the recess 2b by a heater mounting plate 33 that is a member.
In addition, according to the configuration in which the inner container 2 is pressed and held through the heat insulating material 32 as the heat insulating member, the heater 1 provided in the inner container 2 is
The upper surface and the outer peripheral surface are recessed in the recess 2b formed at the bottom of the
It is fitted so as to come into contact with the inner surface of 2b, and in addition to the upper surface of the heater 1, the outer peripheral surface of the heater 1 having a large thickness also serves as the inner container 2.
Heat transfer surface directly to the heater mounting plate.
It is well held by pressing from the back surface by the 33, the heat insulating material 32 and the spring member 31.

Further, although the back surface of the heater 1 is the only surface that does not affect the direct heat conduction to the inner container 2, the heat insulating material 32 located in the recess 2b traps the heater 1 and the spring member 31 in the recess 2b. With this state, the heat that tries to escape to the back side of the heater 1 is contained in the recess 2b and does not easily escape to the outside, but most of it is transferred to the inner container 2 side.

Further, since there is no gap between the outer peripheral surface of the heater 1 and the recess 2b, the heater 1 is not displaced even if it is only held by being pressed from the back side via the spring member 31. Therefore, it is possible to prevent the heat conduction position of the heater 1 from being biased to the inner container 2, and the movement of the heater 1 to loosen the contact with the inner container 2.

Therefore, the heat from the heater 1 can be sufficiently prevented from escaping to the outside of the inner container 2, and the efficiency of heating the content liquid can be sufficiently improved.

Like the heater 1, the spring member 31, the heat insulating material 32, and the heater mounting plate 33 have through holes 31a, 32a, and 33a in the center, and the through hole 1a of the heater 1 is provided.
The heat-sensitive controller 34 is attached to the bottom central bottom surface of the inner container 2 by using also, and the outside is covered with the heat insulating material 35 to avoid the direct heat effect from the heater 1 and to detect the temperature of the content liquid more accurately. I am able to do it.

The spring member 31 is formed so that a large number of cut and raised pieces 31b are projected around the through hole 31a toward the heater 1 side. This cut and raised piece
31b exhibits a relatively strong spring property depending on the material and thickness of the spring member 31. Therefore, the pressing of the heater mounting plate 33 against the heater 1 is sufficiently performed through the spring action of the large number of cut and raised pieces 31b, and the top surface 2c of the recess 2b of the inner container 2 for processing and the heater of the heater 1 are processed. Even if the bottom portion 21a of the case 21 does not come into close contact with the bottom portion 21a, the cut-and-raised piece 31 that acts on each portion of the heater 1
Due to the strong spring action of b, each part of the heater 1 is elastically pressed individually and brought into close contact with the top surface 2c.

Moreover, even if the heater 1 expands or contracts due to the influence of heat and is distorted and is separated from the top surface 2c, such distortion is suppressed by the elastic pressing of the respective parts, and the initial contact state is well maintained. You can Therefore, the heat transfer efficiency from the heater 1 to the inner container 2 is improved.

Further, the heat on the back side of the heater 1 is difficult to be transferred to the inner container 2, but the spring member 31 is in contact with the back surface of the heater 1 at a large number of cut-and-raised pieces 31b, and the spring member 31 itself is also close to the back surface of the heater 1. The heat is efficiently received by the heat conduction and radiation on the back side of the heater 1, and the heat insulating material 32 on the back side suppresses the heat radiation to the lower side of the body 6, and the spring member 31 is fitted to the inner peripheral surface 2d of the recess 2b of the inner container 2. Heater 1 from inner peripheral wall 31c to inner container 2
The heat received from the back surface is efficiently transmitted to the inner container 2.

This also improves the heat transfer efficiency from the heater 1 to the inner container 2.

The connecting fitting 4 has a heater mounting plate 33 on the upper side 4a of the inner container 2.
At the same time, the bottom member 5 is attached to the mounting member 37 with screws 36, and the bottom member 5 is attached to the lower ends of both legs 4b of the connecting member 4 with screws 38. It is installed at the same time.

The bottom member 5 is provided with a microcomputer board 40 which is connected to the vapor sensor 10, the heat-sensitive controller 34, the heater wires 23a and 23b, and the like in a downward recess 5a closed by a cover plate 39, and the heater 1 is energized and controlled. I am doing it. The microcomputer board 40 is attached to the ceiling wall 5b of the recess 5a by a screw 41 via a spacer protrusion 5c so that the screw 41 does not penetrate upward relative to the protrusion 5c. Thus, even if water leaks from above, the microcomputer board 40 is protected by the ceiling wall 5b of the recess 5a.

In the second embodiment of the present invention shown in FIG. 3, a pressing portion 31d for the heater 1 having the cut and raised piece 31b of the spring member 31,
When the caulking portion 1b of the heater case 21 on the rear surface of the heater 1 is formed to escape and the heater 1 is cut and raised and the spring property of the piece 31b is used for pressing, the cut and raised piece 31b cuts and raises the spring portion 31. The spring member 31 comes into contact with the inside of the heater 1 and comes into close contact with the back surface of the heater 1.

For this reason, the heat of the back portion of the heater 1 is more easily transferred to the spring member 31, and the conduction of the heat of the back portion of the heater 1 to the inner container 2 can be enhanced.

In the third embodiment of the present invention shown in FIG. 4, a heat conducting plate 51 made of, for example, aluminum, having good heat conductivity is interposed between the spring member 31 and the heater 1, and a peripheral wall 51b of the heat conducting plate 51 is provided. The inner container 2
It is fitted to the inner circumference 2d of the recess 2b. As a result, the heat from the back of the heater 1 can be more efficiently transferred to the inner container 2. 51a
Is a through hole provided in the center of the heat conduction plate 51.

The caulking portion 1b of the container opening 21a of the heater case 21 is formed so as not to project to the plane behind the heater 1.

In a fourth embodiment of the present invention shown in FIG. 5, the spring member 31 is formed in a corrugated cross section to provide an elastic protrusion 31d.
The heater 1 is pressed by. The corrugated shape may be annular or linear. Alternatively, the elastic protrusions 31d may be independent in a mountain shape.

Most of the spring portion 31 of this embodiment floats from the back surface of the heater 1, which is slightly disadvantageous in conducting the heat of the back portion of the heater 1 to the inner container 2, but the surface facing the heater 1 is mirror-finished. By doing so, the radiant heat from the back of the heater 1 can be repelled, and the escape of heat to the lower part of the body 6 together with the heat insulating material 32 can be suppressed more positively. As a result, the heater 1
The heat of the back can be efficiently given to the inner container 2 by conduction and radiation.

The fifth embodiment of the present invention shown in FIG.
The lid plate of the spring member 31 made of spring, for example, stainless steel 31
The cut-and-raised piece 31b is formed on this to press the heater 1 with a spring action. A heat conducting plate 51 is applied to the back of the spring member 31 to improve heat conduction to the inner container 2.

(Effects of the Invention) According to the present invention, the heater provided in the hot water storage container is fitted in the recess formed in the bottom of the hot water storage container so that the upper surface and the outer peripheral surface contact the inner surface of the recess, and the upper surface of the heater. In addition, the outer peripheral surface of the thick heater also serves as a heat conducting surface directly to the hot water storage container, and this state is often maintained by pressing from the back surface by the heater mounting member, the heat insulating member and the spring member.

Further, although the back surface of the heater is the only surface that does not affect the direct heat conduction to the hot water storage container, the heat insulating member located in the recess allows the heater and the spring member to be confined in the recess. The heat that tries to escape to the back side of the is confined in the recess, and does not easily escape to the outside, but most of it is transferred to the hot water storage container side.

Furthermore, since there is no gap between the outer peripheral surface of the heater and the recess, the heater will not be displaced even if it is only held by being pressed from the back side via the spring member. It is possible to avoid that the position of heat conduction to the hot water storage container is deviated and that the contact with the hot water storage container is weakened due to the movement of the heater.

Therefore, the heat from the heater can be sufficiently prevented from escaping to the outside of the hot water storage container, and the heating efficiency of the content liquid can be sufficiently improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing the first embodiment of the present invention, excluding the outer case and lid of an electric pot, FIG. 2 is an exploded perspective view of a heater mounting portion, and FIGS. It is a partial sectional view showing each of the 2nd, 3rd, 4th, and 5th examples of a device. 1 ... Heater 2 ... Inner container (hot water container) 2b ... Recess 31 ... Spring member 33 ... Heater mounting plate (Heater mounting member) 35 ... Insulation material (insulation member)

Claims (1)

[Scope of utility model registration request] 1. A heater is fitted into a recess formed in the bottom of a hot water storage container so that the upper surface and the outer peripheral surface of the heater are in contact with the inner surface of the recess, and the heater is mounted in the recess by a heater mounting member mounted on the hot water storage container. A heater mounting device for an electric hot water storage container, characterized in that it is pressed and held via a spring member and a heat insulating member located at the position.